CVE-2020-23839
A Reflected Cross-Site Scripting (XSS) vulnerability in GetSimple CMS v3.3.16, in the admin/index.php login portal webpage, allows remote attackers to execute JavaScript code in the client's browser and harvest login credentials after a client clicks a…
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 10.5%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.
Description
A Reflected Cross-Site Scripting (XSS) vulnerability in GetSimple CMS v3.3.16, in the admin/index.php login portal webpage, allows remote attackers to execute JavaScript code in the client's browser and harvest login credentials after a client clicks a link, enters credentials, and submits the login form.
- CVSS 3.1
- 6.1 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS
- 10.46% probability · 96th percentile
- Public exploits
- 1 in Exploit-DB · first 30 March 2021
- CISA KEV
- Not listed
- Weakness
- CWE-79
- Affected
- get-simple/getsimple cms
- Source
- cve@mitre.org
EPSS 10.5% since 3 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/162016/GetSimple-CMS-3.3.16-Cross-Site-Scripting-Shell-Upload.htmlThird Party Advisory, VDB Entry
- https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1330Exploit, Third Party Advisory
- https://github.com/boku7/CVE-2020-23839Third Party Advisory
- https://www.exploit-db.com/exploits/49726Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/162016/GetSimple-CMS-3.3.16-Cross-Site-Scripting-Shell-Upload.htmlThird Party Advisory, VDB Entry
- https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1330Exploit, Third Party Advisory
- https://github.com/boku7/CVE-2020-23839Third Party Advisory
- https://www.exploit-db.com/exploits/49726Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.